The Myriad Prequel Prenatal Screen is a noninvasive prenatal screen that uses cell-free DNA (cfDNA) to determine if a pregnancy is at an increased risk for common chromosome abnormalities, such as Down syndrome.
cfDNA screening has been shown to be superior to methods that use maternal age, ultrasound, and serum screening. This results in a lower false-positive rate and false-negative rate.5
The Prequel Prenatal Screen can be ordered together with the Foresight® Carrier Screen and offered to all women, including those with high BMI, an ovum donor or a twin pregnancy. Prequel can now provide individual fetal sex information for twins, in addition to singletons.